Display screen or portion thereof with a graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface showing a selection screen for selecting a virtual press plate and a décor including a ceramic-style virtual press plate and a ceramic-style décor.

FIG. 2 is a perspective view of the display screen or portion thereof with a graphical user interface of FIG. 1 showing a selection screen for selecting a virtual press plate and a décor including a ceramic-style virtual press plate and a ceramic-style décor; and,

FIG. 3 is an enlarged partial front view of a display screen or portion thereof with a graphical user interface showing a virtual pressed decorative laminate screen including a ceramic-style décor wherein the texture imparted by the virtual press plate is partially peeled away revealing the unpressed decorative layer.

The appearance of the image sequentially transitions between the images shown in FIG. 1 and FIG. 3, and FIG. 2 and FIG. 3. The process or period in which an image transitions to another forms no part of the claimed design.

The broken line showing of display screen, images, text, and other elements are included for the purpose of illustrating portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 